Member Avatar for ely0569

Hello,

If someone could help me I would greatly appreciate it. I have a Toshiba Tecra 9100 that won't operate from the battery. The system operates fine when connected to the AC Adapter. When I unplug the adaptor with the system still on, I recieve a NMI: channel / IOCHK error. After unplugging the AC Adaptor, the operating system stays up until i move the pointer and open a program, then I get the error mesage. I don't think the battery is bad because the system stays on after unplugging the cord, but I cannot get back into the operating system without rebooting first. Does anyone know what is going on? Is the Battery shot? Is the Power Supply bad? PLEEEEEEEASE HELP.

Thank you

Josh

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Additional diagnostic notes and prioritized actions for a Tecra 9100 showing "NMI: Channel / IOCHK" when the AC adapter is removed while the system is running. An NMI at this level is a hardware-level interrupt: it means the chipset or I/O controller reported a serious error. Typical triggers include abrupt power transitions, adapter/DC-jack contact problems, a battery that drops voltage under load, or power-management/ACPI driver conflicts.

Reproduce and isolate first. Cold-boot the machine on battery only (power off, unplug AC, then power on) and note stability. Then boot on AC with the battery removed and unplug the adapter to see whether the problem appears. If the fault happens only during an in-session switch, that points toward power-sense circuitry or a software/driver transition issue. As suggested, intermittent contact or loosely seated RAM can produce similar effects; reseating modules and short reboots to test for mechanical causes are worth doing.

Software and firmware checks next. Boot into Safe Mode and repeat the unplug test: disappearance of the NMI in Safe Mode suggests a driver/utility conflict. OEM power-management utilities have been known to cause such behavior; as noted for a Tecra 9000, disabling/updating Toshiba power software is a sensible diagnostic. Also remove and let Windows reinstall the ACPI/battery device in Device Manager, and update chipset drivers. BIOS updates should be attempted only from Toshiba's official support page and after backing up important data.

Hardware-focused troubleshooting: run a full memory test (Memtest86), inspect and wiggle the DC jack/adapter while powered to detect momentary sags, and try a known-good adapter or battery if available. A battery that shows "accepting charge" can still have high internal resistance and collapse under load, causing an NMI. If all isolation steps fail, the southbridge/power-sense hardware on the motherboard may be at fault and professional service is recommended.

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Member Avatar for Chaky

Microsoft says that it is caused either by hardware malfunction or incopatible drivers. Did you recently install any drivers?

Does it happend ONLY and EVERY time you pull out a chord?

Do you have battery indicator in your taskbar and what does it say?

Member Avatar for ely0569

Microsoft says that it is caused either by hardware malfunction or incopatible drivers. Did you recently install any drivers?

Does it happend ONLY and EVERY time you pull out a chord?

Do you have battery indicator in your taskbar and what does it say?

it happens every time that i pull the cord out. Yes there is a battery indicator on the taskbar and it says that the battery is accepting charge. I have not changed any drivers, but I was thinking that if maybe I uninstalled the cattery drivers and reinstalled, it might work. What do you think?

Thanks

Josh

Member Avatar for Chaky

I think that it's definitly a powe issue.
When you pull the cable out you obviusly shock the system (maybe, for example, the display "blinks" and such) and it's subtile enough that system don't detect any voltage change, but it's enough to mess up memory, hd operation or whatever. (I'm shooting in a dark here)
Then, again, it can be the mechanical shock of pulling the cable caused by loose memory stick. Try shaking a laptop to see if you can reproduce the same effect.

You didn't say if the system behaves normaly when running on battery only.

Member Avatar for tastewart

Heres how I fixed it on a Tecra 9000. Uninstall the program "Toshiba Power Saver".
That was it!
Good Luck

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